Certs, quotes and invoices — done before you're back in the van.

Job management built by a Gas Safe engineer. Fill in gas and electrical certificates on your phone, invoice from the same job, and start with the 14-day intro — no card needed.

Plumbing & HeatingGasElectricalContractorsMaintenance

Built by a Gas Safe registered engineerUK-based · 14-day intro

Who builds it

Built by a tradesman, not a software company

3inc8 is built by a Gas Safe registered engineer who runs a real heating business — the quotes, certs and invoices in this app are the ones he sends his own customers. If it doesn't survive a day on the tools, it doesn't ship.

Gas Safe registered Runs a heating business day to day Sends his own paperwork from it

How it works

From job booked to invoice sent, in three moves

The certificate and the invoice both start from the job, so the customer's details come with them.

  1. Book the job

    Add the customer, the address and the work. Everything after hangs off this job.

  2. Fill in the certificate on site

    Gas or electrical, on your phone, with the photos and notes from the visit kept alongside.

  3. Invoice and send

    Raise the invoice from the same job and send it, with the certificate, to the customer.

Dispatch

Assign work in seconds

Import jobs, assign the right person, and see what's happening across the business in one visual board.

  • CSV job import
  • Unassigned job queue
  • Team member columns
  • Drag-and-drop assignment
  • Job status colours
  • Work source tracking

Certificates & paperwork

Certificates issued from the job, not from a stack of forms

Gas, electrical and service paperwork lives with the job it belongs to. Fill it in on site, keep the photos and notes from the visit alongside, and send it to the customer when it's done.

  • Certificates tied to the job and the customer
  • Photos and observations kept with the record
  • Sent to the customer from the app
  • Compliance where your trade needs it — not where it doesn't

Industries

Built for the trades

Pricing

Simple, transparent pricing

Start with the 14-day intro — then Blue or Blue+ to keep working.

14-day intro

£0

Then Blue or Blue+ to keep working. Your data and public Profile stay.

  • 5 clients, 5 jobs, 3 quotes, 1 invoice, 1 certificate, 2 paperwork
  • No engineers, Dispatch or AI

Blue

£12.99/mo

Founding member price: £8.99/mo

Locked for as long as your subscription stays active.

Everything unlimited, plus your first Engineer seat.

  • Unlimited clients, jobs, quotes & invoices
  • Unlimited certificates & paperwork
  • 1 Engineer seat included
  • Assign jobs to your engineer
  • Customer portal & shareable documents
  • PDF export on everything you issue

Cancel anytime. No long-term commitment.

Blue+

Coming soon

£19.99/mo

Founding member price: £14.00/mo

Locked for as long as your subscription stays active.

For teams — three Engineer seats and the dispatch board.

  • Everything in Blue
  • 3 Engineer seats included
  • Assign engineers & track their work
  • Team dispatch board

Blue+ can’t be purchased in-app yet — start with the intro or Blue and upgrade when it opens.

Run jobs, customers, quotes, invoices, scheduling and your team — all in one place.

Stop chasing paperwork. Run your trade business properly.

Everything from jobs and quotes to invoices and your team, in one system. Start with the 14-day intro and get set up in minutes.

Cancel anytime. No long-term commitment.

Can we use analytics?

If you accept, our hosting provider, Base44, keeps a random ID in your browser and records which pages and features you use, so we can see what to improve. Nothing is stored or sent for analytics unless you accept, and 3inc8 works the same either way. Privacy policy